“The Department of State alerts U.S. citizens to the continued potential for terrorist attacks, particularly in the Middle East and North Africa, and possibly occurring in or emanating from the Arabian Peninsula. Current information suggests that al-Qa’ida and affiliated organizations continue to plan terrorist attacks both in the region and beyond, and that they may focus efforts to conduct attacks in the period between now and the end of August. This Travel Alert expires on August 31, 2013.”It adds, “We strongly recommend that U.S. citizens Traveling abroad enroll in the Department of State’s Smart Traveler Enrollment Program (STEP). STEP enrollment gives you the latest security updates, and makes it easier for the U.S. embassy or nearest U.S. consulate to contact you in an emergency. If you don’t have Internet access, enroll directly with the nearest U.S. embassy or consulate.”

CNN is reporting that some U.S. embassies in the region, including those in Egypt and Israel, will close starting on Sunday for an unspecified length of time.

As of this writing, there is no detail about the nature of the threat.

Update: August 5, 10:07 a.m.
Nineteen U.S. diplomatic posts have also been closed, at least through this week.